Field-theory Two-point Functions via Negative Dimension Integration

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Team teaching : working together to promote student learning

This book chapter examines the concept of team teaching from the perspective of the various stakeholders, in order to discuss the advantages and disadvantages of team teaching for students, to consider the positive and negative dimensions of collaborative teaching for teachers, and to review the implications for educational administration. In addition, attention will be paid to the issues associated with team teaching in the context of e-learning. The chapter concludes with a case study which discusses how the implementation of collaborative teaching within the library and information science discipline at an Australian university helped develop the authors’ understanding of socially constructed knowledge.

A prática e a representação social do tabagismo entre fumantes, ex-fumantes e não fumantes

Atualmente o tabagismo é considerado pela Organização Mundial da Saúde (OMS) como um fator de risco à vida a ser combatido com alta prioridade. No entanto, um processo maciço de propaganda e marketing parece ter sido historicamente decisivo para dar à prática de fumar uma representação positiva, através de uma associação sistemática entre o consumo de derivados do tabaco e o ideal de auto-imagem, como beleza, sucesso, saúde e liberdade. Essa transformação da imagem do cigarro de símbolo de status e saúde para uma séria doença a ser combatida evidencia a importância de analisar o tabagismo como um fenômeno psicossocial. O objetivo geral desta investigação consiste, portanto, em analisar comparativamente as representações sociais acerca do tabagismo construídas por grupos de indivíduos que se incluam diferencialmente nas condições de fumantes, ex-fumantes e não-fumantes. A pesquisa foi realizada com uma amostra de 500 (quinhentos) participantes residentes no Estado do Rio de Janeiro, de ambos os sexos, podendo pertencer às categorias de fumantes, ex-fumantes e não-fumantes. A coleta de dados foi realizada por meio eletrônico, através da aplicação de um questionário, que em parte focaliza os dados sóciodemográficos dos participantes e, em outra, apresenta questões abertas e fechadas, incorporando ainda uma tarefa de evocação livre ante o termo indutor tabagismo ou prática de fumar. Os resultados da análise estrutural da representação social do tabagismo possibilitou verificar uma unanimidade quanto à significação controversa que é atribuída a ele. De um lado, verificam-se dimensões negativas desta prática, que são objetivadas pelas implicações e repercussões na saúde dos fumantes ativos e passivos e, por outro lado, existem as dimensões positivas, que representam as funções sociais do tabagismo, e as sensações prazerosas que ele provoca nos fumantes. Observa-se o processo de construção de uma nova representação social do tabagismo, onde é estabelecida uma conexão entre uma velha representação do tabagismo enquanto hábito de vida, estilo de vida, com uma nova representação, o tabagismo como vício/dependência, criando novos significados e imagens do objeto. Para concluir, vale ressaltar que as representações sociais dos ex-fumantes e dos não-fumantes mostraram-se bastantes próximas, ressaltando essencialmente os aspectos negativos do tabagismo, enquanto que a dos fumantes diferenciam-se um pouco ao apresentar elementos como prazer. Mas de modo geral, as representações não mostraram-se tão distintas, revelando que os próprios fumantes vivenciam uma relação muito antagônica com o tabagismo, manifestando em diversos momentos vontade de tornarem-se ex-fumantes. Parece que a representação do tabagismo como um hábito glamoroso não mais existe e que de fato a política de controle a ele vem obtendo êxito com suas medidas restritivas o que é algo extremamente positivo para nossa sociedade do ponto de vista da saúde pública. No entanto, na esfera social, parece necessário que essa atmosfera de temor e asco envolta no tabagismo seja pensada e refletida, para que não resulte em discriminação social com os tabagistas, tornando-os novamente vítima, mas de uma nova situação social

The light-cone gauge without prescriptions

Feynman integrals in the physical light-cone gauge are more difficult to solve than their covariant counterparts. The difficulty is associated with the presence of unphysical singularities due to the inherent residual gauge freedom in the intermediate boson propagators constrained within this gauge choice. In order to circumvent these non-physical singularities, the headlong approach has always been to call for mathematical devices - prescriptions - some successful and others not. A more elegant approach is to consider the propagator from its physical point of view, that is, an object obeying basic principles such as causality. Once this fact is realized and carefully taken into account, the crutch of prescriptions can be avoided altogether. An alternative, third approach, which for practical computations could dispense with prescriptions as well as avoiding the necessity of careful stepwise consideration of causality, would be of great advantage. and this third option is realizable within the context of negative dimensions, or as it has been coined, the negative dimensional integration method (NDIM).

Stress, depressão e qualidade de vida em beneficiários de programas de transferência de renda

Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC

Resiliência, Coping e Autocompaixão em Cuidadores Formais da Rede Nacional de Cuidados Continuados Integrados

Introdução: Na literatura internacional e nacional verifica-se a inexistência de estudos sobre os correlatos psicológicos de cuidadores formais, como a resiliência e o coping. Apesar de se reconhecer a importância de uma prestação de cuidados mais compassivos e humanizados, mais uma vez, não existem estudos nesta área. Este facto estende-se aos cuidadores formais que trabalham com pessoas em situação de dependência, na Rede Nacional de Cuidados Continuados Integrados. Assim, foram nossos objetivos: caraterizar os cuidadores formais de algumas Unidades de Cuidados Continuados (UCC) da RNCCI em variáveis sociodemográficas e profissionais; analisar os seus níveis de resiliência, coping e autocompaixão; verificar se existem associações significativas entre estas variáveis e com as variáveis sociodemográficas e profissionais. Metodologia: 78 cuidadores formais (sexo feminino, n = 76; 97,4%), com uma média de idades de 35,45 anos (DP = 9,0) forneceram o seu consentimento informado para preencherem um questionário sociodemográfico e profissional, a Escala de Avaliação Global da Resiliência, o Brief COPE e a Self Compassion Scale (SELFCS). Resultados: Os cuidadores revelaram um nível médio de resiliência (total). A dimensão de coping com média mais elevada foi o Coping ativo e a com média mais baixa foi o Uso de substâncias. Na SELFCS a dimensão com média mais elevada foi o Calor/compreensão e a com média mais baixa foi o Isolamento. No geral, a pontuação total de resiliência correlacionou-se de forma positiva com as dimensões positivas da autocompaixão (SELFCS) e de forma negativa com as dimensões negativas desta escala. As dimensões mais positivas de coping correlacionaram-se de forma positiva com as dimensões positivas de autocompaixão e as mais negativas de coping com as dimensões negativas de autocompaixão. Quanto maior a idade dos cuidadores menor o nível de Suporte Emocional e maior o nível de Religião e Mindfulness. Mais horas de trabalho associaram-se a menor resiliência e a maior nível de Suporte Emocional Discussão: Este estudo revelou, ainda que numa amostra reduzida, que os cuidadores formais das UCC parecem revelar níveis equilibrados em correlatos psicológicos importantes quando se “cuida” de outra pessoa. Porém, as UCC devem preocupar-se em fomentar, junto dos cuidadores, níveis mais elevados de resiliência, estratégias mais positivas de coping e a compaixão auto e hétero dirigida, para assegurar um “cuidar” mais pleno quer para os profissionais, quer para aqueles que são cuidados. / Introduction: In the international and national literature, we verified the inexistence of studies about psychological correlates of formal caregivers, such as resilience and coping. Although the importance of more humanized and compassive care is recognized, again, there are no studies in this area. This is also verified regarding formal caregivers that work with people in a dependence situation, as in the National Network of Continuous Care. Our aims were to characterize the formal caregivers from some units of the National Network of Continuous Care in sociodemographic and professional variables; analyze these professionals levels of resilience, coping and self-compassion; verify if there are significant associations between these variables and with the sociodemographic and professional variables. Methodology: 78 formal caregivers (female, n = 76; 97,4%), with an mean age of 35,45 years (SD = 9,0) provided their informed consent to fill in a professional and sociodemographic questionnaire, the Global Resiliency Evaluation Scale, the Brief COPE and the Self Compassion Scale (SELFCS). Results: The caregivers showed a medium level of resilience. The coping dimension with the highest mean was Active coping and the dimension with the lowest mean was Substance Use. Regarding SELFCS the dimension with the highest mean was Warmth, contrasting with Isolation, the dimension with the lowest mean. Overall, the total score of resilience was positively correlated with self-compassion positive dimensions (SELFCS) and negatively correlated with the negative dimensions of this scale. The most positive dimensions of coping were positively correlated with the positive dimensions of self-compassion and the most negative dimensions of coping were correlated with the negative dimensions of self-compassion. Older caregivers showed lower use of Emotional support and higher level of Religion and Mindfulness use. More daily hours of work were associated with less resilience and higher Emotional Support. Discussion: This study revealed, although in a small sample, that Continuous Care Units (CCU) formal caregivers seem to have balanced levels of psychological correlates that are important while caring for others. However, the CCU should promote, in the caregivers higher levels of resilience, coping and self-compassion, to ensure a better care, simultaneously the professionals and patients.

Comprometimento Organizacional, Autocriticismo e Autocompaixão em Profissionais/Cuidadores Formais que Trabalham com Pessoas com Deficiência/Doença Mental

Introdução: Alguns estudos internacionais e nacionais têm-se dedicado a estudar as caraterísticas psicológicas de profissionais/cuidadores que trabalham na área da prestação de cuidados a pessoas com doença e deficiência mental. Porém, segundo temos conhecimento são escassos ou mesmo inexistentes os estudos que abordem os níveis de autocriticismo, autocompaixão e comprometimento organizacional destes profissionais/cuidadores. Foram nossos objetivos: caraterizar uma amostra de cuidadores formais/profissionais que trabalham com pessoas com doença e deficiência mental em diferentes variáveis sociodemográficas e profissionais; analisar os níveis de autocriticismo, autocompaixão e comprometimento organizacional destes cuidadores formais/profissionais, bem como explorar as associações entre todas estas variáveis (entre si e com as variáveis sociodemográficas e profissionais). Metodologia: 55 cuidadores formais de pessoas com doença/deficiência mental (sexo feminino/n = 49, 84,5%; idade média de 45,21; DP = 10,92; variação = 22-65) preencheram um questionário sociodemográfico, o Questionário de Comprometimento Organizacional, a Escala das Formas do Autocriticismo e Autotranquilização e a Escala de Autocompaixão. Resultados: O Eu inadequado apresentou um valor médio bastante maior que o Eu detestado. O valor médio do Eu tranquilizador foi superior a qualquer dimensão de autocriticismo. O Calor-Compreensão (autocompaixão) apresentou o valor médio mais elevado e a Autocrítica o valor médio mais baixo. O Eu inadequado e detestado associaram-se positivamente às dimensões negativas de autocompaixão e o Eu tranquilizador às dimensões positivas de autocompaixão. O Comprometimento Afetivo associou-se positivamente ao Autocriticismo total. O Comprometimento Calculativo associou-se positivamente ao Eu detestado, que foi seu preditor. O Comprometimento Normativo associou-se de forma positiva ao Eu detestado, Autocriticismo total e idade negativamente ao Mindfulness. A idade foi o seu preditor. O Comprometimento Afetivo associou-se positivamente aos meses de trabalho na instituição, que foram seus preditores. Os cuidadores com um familiar com deficiência mental tiveram um valor mais baixo de Eu inadequado. Discussão: No geral, esta amostra de cuidadores formais apresentou caraterísticas psicológicas que nos tranquilizam quanto ao papel que desempenham junto de pessoas com doença/deficiência mental, mas as instituições devem sempre encontrar formas de estimular os níveis de comprometimento e autocompaixão dos seus profissionais. / Introduction: Some international and national studies have focused on studying the psychological characteristics of professionals/caregivers working with people with mental disease and intelectual disability. However, to our knowledge, the studies exploring levels of selfcriticism, self-compassion and organizational commitment in these professionals are scarce or even nonexistent. Our goals were to: characterize a sample of formal caregivers/professionals who work with people with mental illness and intellectual in different sociodemographic and professional variables; analyze the levels of selfcriticism, self-compassion and organizational commitment of these formal caregivers/professionals, as well as explore the associations between all these variables (with each other and with the sociodemographic and professional variables and professionals). Methodology: 55 caregivers of people with mental disease/intelectual disability (female/n = 49, 84.5%; mean age of 45,21; DP = 10,92; variation = 22-65) completed a sociodemographic questionnaire, the Organizational Commitment questionnaire, the Forms of Self Criticism Rating Scale and the Self- Compassion Scale. Results: Inadequate Self had na higher mean value than the Hated Self. The mean value of the Reassuring Self was higher than any dimension of selfcriticism. Self-Kindness was the one with a higher mean value (of self-compassion) and Self-Judjment the one with the lowest mean value. The Inadequate Self and the Hated Self were positively associated with the negative dimensions of selfcompassion and the Reassuring Self with the positive dimensions of selfcompassion. The Affective Commitment was positively associated to total selfcriticism. The Continuance Commitment was associated with the Hated Self (positively), being its predictor. The Normative Commitment was positively associated to the Hated Self, the total selfcriticism and age and negatively to Mindfulness. Age was its predictor. The Affective Commitment was positively associated to months of work at the institution. This variable was its predictor. Professionals with a family member with intellectual disability had a lower value of Inadequate Self. Discussion: In general, this sample of formal caregivers presented psychological characteristics that reassure us about the role that they have while working with people with mental disease/intellectual disability, but the institutions must always find ways of stimulating the commitment and selfcompassion levels of their professionals.

Um ensaio sobre burnout, engagement e estratégias de coping na profissão docente

Investigadores, um pouco por todo o mundo, começaram a preocupar-se com o fenómeno do burnout, ao identificarem este sintoma essencialmente nas profissões que envolviam uma relação assistencial ou de ajuda, como o caso dos médicos, enfermeiros e psicólogos. Contudo, não tardou que se percebesse que este fenómeno pudesse também estar presente na profissão docente de uma forma muito significativa. A docência é, na atualidade, uma das profissões mais sujeitas a altos níveis de stresse, podendo levar ao burnout, caso se torne recorrente. Muitos docentes conseguem adaptar-se e reagir de uma forma funcional perante as dificuldades próprias da profissão, tornando-se profissionais engaged, ou seja, enquanto alguns professores vivenciam as dimensões negativas do burnout (exaustão emocional, despersonalização e perda de realização profissional), outros experienciam as três dimensões positivas do engagement (vigor, dedicação e absorção profissional). Com a entrada da chamada “psicologia positiva”, surge uma nova perspectiva de estudo que procura respostas para determinadas formas de envolvimento profissional. Assim, apesar do fenómeno do engagement ainda não estar muito estudado, encontrar professores engaged com a sua profissão também é uma realidade presente em muitos países. O recurso a estratégias de coping é uma forma de lidar com as dificuldades inerentes ao exercício da profissão docente. Logo, é importante perceber de que forma a utilização de determinado tipo de estratégia de coping poderá conduzir ao burnout ou, preferencialmente, ao engagement.

Early alveolar bone grafting has a negative effect on maxillary dental arch dimensions of pre-school children with complete unilateral cleft lip and palate

To evaluate maxillary dental arch dimensions in pre-school children with a complete unilateral cleft lip and palate (CUCLP) after early alveolar bone grafting.

The differential effects of organizational antecedents on dimensions of corporate entrepreneurship

This study seeks to further delineate how organizational antecedents differentially influence the three components of corporate entrepreneurship: innovation, venturing or strategic renewal. We argue that structural differentiation may help organizations to maintain multiple and often conflicting demands of entrepreneurial and mainstream activities. Taking a social capital perspective, our study further examines two contingencies in the form of informal integration mechanisms (i.e. connectedness and TMT social integration). Our findings show structural differentiation has a positive effect on all three components of corporate entrepreneurship, yet the effect is moderated by integration mechanisms. Interunit connectedness has a positive moderation effect regarding innovation and venturing, and TMT social integration has a negative moderation effect regarding strategic renewal. This reveals that innovation is influenced by informal integration mechanisms on the organizational level, strategic renewal on top management team level, while venturing is influenced by integration mechanisms on both levels.

A head-mounted display as a personal viewing device: Dimensions of subjective experiences

The use of head-mounted displays (HMDs) can produce both positive and negative experiences. In an effort increase positive experiences and avoid negative ones, researchers have identified a number of variables that may cause sickness and eyestrain, although the exact nature of the relationship to HMDs may vary, depending on the tasks and the environments. Other non-sickness-related aspects of HMDs, such as users opinions and future decisions associated with task enjoyment and interest, have attracted little attention in the research community. In this thesis, user experiences associated with the use of monocular and bi-ocular HMDs were studied. These include eyestrain and sickness caused by current HMDs, the advantages and disadvantages of adjustable HMDs, HMDs as accessories for small multimedia devices, and the impact of individual characteristics and evaluated experiences on reported outcomes and opinions. The results indicate that today s commercial HMDs do not induce serious sickness or eyestrain. Reported adverse symptoms have some influence on HMD-related opinions, but the nature of the impact depends on the tasks and the devices used. As an accessory to handheld devices and as a personal viewing device, HMDs may increase use duration and enable users to perform tasks not suitable for small screens. Well-designed and functional, adjustable HMDs, especially monocular HMDs, increase viewing comfort and usability, which in turn may have a positive effect on product-related satisfaction. The role of individual characteristics in understanding HMD-related experiences has not changed significantly. Explaining other HMD-related experiences, especially forward-looking interests, also requires understanding more stable individual traits and motivations.

Modelling predicts positive and negative interactions between three Australian tropical tree species in monoculture and binary mixture

Computer modelling promises to be an important tool for analysing and predicting interactions between trees within mixed species forest plantations. This study explored the use of an individual-based mechanistic model as a predictive tool for designing mixed species plantations of Australian tropical trees. The `spatially explicit individually based-forest simulator' (SeXI-FS) modelling system was used to describe the spatial interaction of individual tree crowns within a binary mixed-species experiment. The three-dimensional model was developed and verified with field data from three forest tree species grown in tropical Australia. The model predicted the interactions within monocultures and binary mixtures of Flindersia brayleyana, Eucalyptus pellita and Elaeocarpus grandis, accounting for an average of 42% of the growth variation exhibited by species in different treatments. The model requires only structural dimensions and shade tolerance as species parameters. By modelling interactions in existing tree mixtures, the model predicted both increases and reductions in the growth of mixtures (up to +/-50% of stem volume at 7 years) compared to monocultures. This modelling approach may be useful for designing mixed tree plantations.

Depression, Anxiety, Psychiatric Comorbidity and Dimensions of Temperament and Personality

This study is part of the Mood Disorders Project conducted by the Department of Mental Health and Alcohol Research, National Public Health Institute, and consists of a general population survey sample and a major depressive disorder (MDD) patient cohort from Vantaa Depression Study (VDS). The general population survey study was conducted in 2003 in the cities of Espoo and Vantaa. The VDS is a collaborative depression research project between the Department of Mental Health and Alcohol Research of the National Public Health Institute and the Department of Psychiatry of the Peijas Medical Care District (PMCD) beginning in 1997. It is a prospective, naturalistic cohort study of 269 secondary-level care psychiatric out- and inpatients with a new episode of Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV) MDD. In the general population survey study, a total of 900 participants (300 from Espoo, 600 from Vantaa) aged 20 70 years were randomly drawn from the Population Register Centre in Finland. A self-report booklet, including the Eysenck Personality Inventory (EPI), the Temperament and Character Inventory Revised (TCI-R), the Beck Depression Inventory and the Beck Anxiety Inventory was mailed to all subjects. Altogether 441 participants responded (94 returned only the shortened version without TCI-R) and gave their informed consent. VDS involved screening all patients aged 20-60 years (n=806) in the PMCD for a possible new episode of DSM-IV MDD. 542 consenting patients were interviewed with a semi-structured interview (the WHO Schedules for Clinical Assessment in Neuropsychiatry, version 2.0). 269 patients with a current DSM-IV MDD were included in the study and further interviewed with semi-structured interviews to assess all other axis I and II psychiatric diagnoses. Exclusion criteria were DSM-IV bipolar I and II, schizoaffective disorder, schizophrenia or another psychosis, organic and substance-induced mood disorders. In the present study are included those 193 (139 females, 54 males) individuals who could be followed up at both 6 and 18 months, and their depression had remained unipolar. Personality was investigated with the EPI. Personality dimensions associated not only to the symptoms of depression, but also to the symptoms of anxiety among general population and in depressive patients, as well as to comorbid disorders in MDD patients, supporting the dimensional view of depression and anxiety. Among the general population High Harm Avoidance and low Self-Directedness associated moderately, whereas low extraversion and high neuroticism strongly with the depressive and anxiety symptoms. The personality dimensions, especially high Harm Avoidance, low Self-Directedness and high neuroticism were also somewhat predictive of self-reported use of health care services for psychiatric reasons, and lifetime mental disorder. Moreover, high Harm Avoidance associated with a family history of mental disorder. In depressive patients, neuroticism scores were found to decline markedly and extraversion scores to increase somewhat with recovery. The predictive value of the changes in symptoms of depression and anxiety in explaining follow-up neuroticism was about 1/3 of that of baseline neuroticism. In contrast to neuroticism, the scores of extraversion showed no dependence on the symptoms of anxiety, and the change in the symptoms of depression explained only 1/20 of the follow-up extraversion compared with baseline extraversion. No evidence was found of the scar effect during a one-year follow-up period. Finally, even after controlling for symptoms of both depression and anxiety, depressive patients had a somewhat higher level of neuroticism (odds ratio 1.11, p=0.001) and a slightly lower level of extraversion (odds ratio 0.92, p=0.003) than subjects in the general population. Among MDD patients, a positive dose-exposure relationship appeared to exist between neuroticism and prevalence and number of comorbid axis I and II disorders. A negative relationship existed between level of extraversion and prevalence of comorbid social phobia and cluster C personality disorders. Personality dimensions are associated with the symptoms of depression and anxiety. Futhermore these findings support the hypothesis that high neuroticism and somewhat low extraversion might be vulnerability factors for MDD, and that high neuroticism and low extraversion predispose to comorbid axis I and II disorders among patients with MDD.

Negative index photonic crystal lenses based on carbon nanotube arrays

We report a novel utilization of periodic arrays of carbon nanotubes in the realization of diffractive photonic crystal lenses. Carbon nanotube arrays with nanoscale dimensions (lattice constant 400 nm and tube radius 50 nm) displayed a negative refractive index in the optical regime where the wavelength is of the order of array spacing. A detailed computational analysis of band gaps and optical transmission through the nanotubes based planar, convex and concave shaped lenses was performed. Due to the negative-index these lenses behaved in an opposite fashion compared to their conventional counter parts. A plano-concave lens was established and numerically tested, displaying ultra-small focal length of 1.5 μm (∼2.3 λ) and a near diffraction-limited spot size of 400 nm (∼0.61 λ). © 2012 Elsevier B.V. All rights reserved.

Cross-cultural dimensions of meaning in the evaluation of events in world history? Perceptions of historical calamities and progress in cross-cultural data from 30 societies

The universality versus culture specificity of quantitative evaluations (negative-positive) of 40 events in world history was addressed using World History Survey data collected from 5,800 university students in 30 countries/societies. Multidimensional scaling using generalized procrustean analysis indicated poor fit of data from the 30 countries to an overall mean configuration, indicating lack of universal agreement as to the associational meaning of events in world history. Hierarchical cluster analysis identified one Western and two non-Western country clusters for which adequate multidimensional fit was obtained after item deletions. A two-dimensional solution for the three country clusters was identified, where the primary dimension was historical calamities versus progress and a weak second dimension was modernity versus resistance to modernity. Factor analysis further reduced the item inventory to identify a single concept with structural equivalence across cultures, Historical Calamities, which included man-made and natural, intentional and unintentional, predominantly violent but also nonviolent calamities. Less robust factors were tentatively named as Historical Progress and Historical Resistance to Oppression. Historical Calamities and Historical Progress were at the individual level both significant and independent predictors of willingness to fight for one’s country in a hierarchical linear model that also identified significant country-level variation in these relationships. Consensus around calamity but disagreement as to what constitutes historical progress is discussed in relation to the political culture of nations and lay perceptions of history as catastrophe.